/*
 * The MIT License (MIT)
 * Copyright © 2019 <sky>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the “Software”), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.skycloud.base.config.logger;

import com.ctrip.framework.apollo.Config;
import com.ctrip.framework.apollo.model.ConfigChangeEvent;
import com.ctrip.framework.apollo.spring.annotation.ApolloConfig;
import com.ctrip.framework.apollo.spring.annotation.ApolloConfigChangeListener;
import org.springframework.beans.BeansException;
import org.springframework.cloud.context.environment.EnvironmentChangeEvent;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.util.Set;

/**
 * 动态日志配置
 *
 * @author
 */
@Component
public class LoggerLevelRefresher implements ApplicationContextAware {

    private ApplicationContext applicationContext;

    @ApolloConfig
    private Config config;

    @PostConstruct
    private void initialize() {
        refreshLoggingLevels(config.getPropertyNames());
    }

    @ApolloConfigChangeListener(interestedKeyPrefixes = {"logging.level."})
    private void onChange(ConfigChangeEvent changeEvent) {
        refreshLoggingLevels(changeEvent.changedKeys());
    }

    private void refreshLoggingLevels(Set<String> changedKeys) {
        System.out.println("Refreshing logging levels");

        /**
         * refresh logging levels
         * @see org.springframework.cloud.logging.LoggingRebinder#onApplicationEvent
         */
        this.applicationContext.publishEvent(new EnvironmentChangeEvent(changedKeys));

        System.out.println("Logging levels refreshed");
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }
}
